CN113262126B

CN113262126B - Clinical operating table of using of ophthalmic surgery

Info

Publication number: CN113262126B
Application number: CN202110623996.1A
Authority: CN
Inventors: 赖水妹
Original assignee: Hankou Aier Eye Hospital Co Ltd
Current assignee: Hankou Aier Eye Hospital Co Ltd
Priority date: 2021-06-04
Filing date: 2021-06-04
Publication date: 2023-05-05
Anticipated expiration: 2041-06-04
Also published as: CN113262126A

Abstract

The invention relates to an operating table, in particular to an operating table for ophthalmic surgery clinic. Technical problems: provided is an ophthalmic surgery clinical operating table which can be automatically lifted and can be observed. The technical proposal is as follows: an operating table for ophthalmic surgery clinic comprises a supporting frame, a bearing frame, a supporting mechanism and a placing mechanism; the upper part of the support frame is provided with a bearing frame; the supporting mechanism is arranged outside the bearing frame; the placing mechanism is arranged at the upper part of the bearing frame. The invention achieves the effects of automatic lifting and observation; according to the invention, the piston rod of the air cylinder drives the limit ring to move the bearing plate upwards, and the bearing plate drives the air cylinder and the second rotating shaft to rotate when moving upwards, so that the bearing plate is leveled with the bearing frame, and the effect of automatic lifting is achieved.

Description

Clinical operating table of using of ophthalmic surgery

Technical Field

The invention relates to an operating table, in particular to an operating table for ophthalmic surgery clinic.

Background

When the patient treats eyes, the ophthalmic operating table is equipment necessary for eye medical staff and the patient, and the traditional operating table is generally composed of a platform such as an operating table, so that the head of the patient cannot be lifted by the medical staff, various necessary requirements of the medical staff in operation of the patient cannot be well met, the eye of the patient cannot be observed by the medical staff, the anesthesia position cannot be accurately judged, the operation is affected, and the great working difficulty is increased for the medical staff.

In view of the above problems in the prior art, it is desirable to design an ophthalmic surgical clinical operating table which can be automatically lifted and can be observed.

Disclosure of Invention

In order to overcome the defects that the operation table in the prior art can not lift the head and is inconvenient to observe, the technical problem is that: provided is an ophthalmic surgery clinical operating table which can be automatically lifted and can be observed.

The technical proposal is as follows: an ophthalmic surgery clinical operating table, comprising: the upper part of the support frame is provided with a bearing frame; the supporting mechanism is arranged outside the bearing frame; the placing mechanism is arranged at the upper part of the bearing frame.

Further, the supporting mechanism includes: the bearing frame is provided with a bearing plate; the upper part of the placing plate is symmetrically and slidably provided with a C-shaped plate; the first springs are arranged between the C-shaped plate and the placing plate and are sleeved on the C-shaped plate respectively; the first swivel base is symmetrically arranged at the lower part of one side of the bearing frame; the first rotating shafts are rotatably arranged between the first rotating seats; the connecting plates are arranged on the outer sides of the first rotating shafts; the bearing plates are arranged between the connecting plates.

Further, the placement mechanism comprises: the first guide rods are symmetrically and slidably arranged on the bearing plate; a pillow is arranged between the first guide rods; the second springs are respectively arranged between the pillow and the bearing plate and are sleeved on the first guide rods; a placing frame is arranged on one side of the bearing plate in a sliding manner; the clamping blocks are symmetrically and slidably arranged in one side of the bearing plate and are matched with the placement frame; and the third springs are arranged between the clamping blocks and the bearing plates.

Further, still including the lifting subassembly, the lifting subassembly is including: the second rotary seat is symmetrically arranged on one side of the support frame; the second rotating shafts are rotatably arranged between the second rotating seats; the cylinder is arranged on the second rotating shaft; the upper part of the piston rod of the air cylinder is provided with a limiting ring; the groove rods are symmetrically arranged at the lower parts of the bearing plates, third rotating shafts are arranged between the groove rods in a sliding mode, and the third rotating shafts are connected with the limiting rings in a rotating mode.

Further, still including the chucking subassembly, the chucking subassembly is including: the upper part of the bearing plate is symmetrically provided with a shell; the upper part of the receiving plate is symmetrically provided with third rotary seats which are all positioned in the shell; the upper part of the bearing plate is symmetrically provided with two second guide rods; the special-shaped rods are arranged between the second guide rods in a sliding mode, and are matched with the pillow; the inner side of the third rotary seat is provided with a foam cushion in a sliding manner, and the foam cushion is matched with the special-shaped rod; and a fourth spring is arranged between the foam-rubber cushion and the third rotary seat, and the fourth spring is sleeved on the foam-rubber cushion.

Further, the utility model also comprises an operation component, which comprises: the outer sides of the supporting plates are symmetrically provided with two supporting rods; a pushing block is arranged on one side of the special-shaped rod on one side; an arc-shaped plate is rotatably arranged between the support rods on one side of the arc-shaped plate; the stop blocks are arranged on two sides of the arc-shaped plate, and the stop blocks on the left side are matched with the pushing blocks; an outer frame is arranged on one side of the arc-shaped plate; the guide block is arranged on one side of the arc-shaped plate in a sliding mode, the guide block is positioned on the connecting column on the inner side of the outer frame, and the connecting column is arranged on one side of the guide block; the lens is arranged on one side of the connecting column; the push rod is symmetrically and slidably arranged on one side of the guide block; the connecting blocks are arranged between the lower parts of the connecting columns; the lower part of the push rod is respectively provided with a needle cylinder.

Further, the method also comprises the following steps: the opening assembly is arranged at the upper part of the operation assembly.

Further, prop up the subassembly and include: the lower part of the arc-shaped plate is symmetrically provided with the bonding blocks; the lower parts of the bonding blocks are symmetrically and slidably provided with limiting blocks; the sixth springs are arranged between the limiting block and the bonding block, and are sleeved on the limiting block respectively; the sliding rods are connected between the limiting blocks through threads; the lower part of the slide bar is provided with an eyelid retractor which is matched with the needle cylinder; a connecting rod is arranged at the upper part of the outer frame in a sliding manner and is connected with the arc-shaped plate; the special-shaped blocks are arranged at the lower parts of the sliding rods in a sliding mode, and are connected with the connecting rods; and a fifth spring is arranged between the special-shaped block and the arc-shaped plate and is sleeved on the connecting rod respectively.

The beneficial effects are that: 1. the invention achieves the effects of automatic lifting and observation.

2. According to the invention, the piston rod of the air cylinder drives the limit ring to move the bearing plate upwards, and the bearing plate drives the air cylinder and the second rotating shaft to rotate when moving upwards, so that the bearing plate is leveled with the bearing frame, and the effect of automatic lifting is achieved.

3. According to the invention, the guide block is manually moved, and then the guide block drives the connecting column, the push rod and the needle cylinder to move to adjust the operation position, so that eyes can be observed through the lens, and after the position is determined, eye anesthesia can be performed, so that the effect of being capable of observing is achieved.

Drawings

Fig. 1 is a schematic perspective view of a first embodiment of the present invention.

Fig. 2 is a schematic perspective view of a second embodiment of the present invention.

Fig. 3 is a schematic perspective view of a first embodiment of the supporting mechanism of the present invention.

Fig. 4 is a schematic view of a second perspective structure of the supporting mechanism of the present invention.

Fig. 5 is a schematic perspective view of the placement mechanism of the present invention.

Figure 6 is a schematic perspective view of a lifting assembly of the present invention.

Fig. 7 is a schematic perspective view of a clamping assembly according to the present invention.

Fig. 8 is a schematic diagram of a first perspective structure of the operation assembly of the present invention.

Fig. 9 is a schematic diagram of a second perspective structure of the operation assembly of the present invention.

Fig. 10 is a schematic view of a first perspective structure of the distractor assembly of the present invention.

Fig. 11 is a schematic view of a second perspective structure of the distractor assembly of the present invention.

In the reference numerals: 1-supporting frame, 2-bearing frame, 3-supporting mechanism, 31-placing plate, 32-C template, 33-first spring, 34-first rotating shaft, 35-connecting plate, 36-receiving plate, 37-first rotating seat, 4-placing mechanism, 41-first guide bar, 42-pillow, 43-second spring, 44-placing frame, 45-clamping block, 46-third spring, 5-lifting component, 51-second rotating seat, 52-second rotating shaft, 53-cylinder, 54-limiting ring, 55-third rotating shaft, 56-groove bar, 6-clamping component, 61-shell, 62-third rotating seat, 63-second guide bar, 64-special-shaped bar, 65-foam cushion, 66-fourth spring, 7-operating component, 71-supporting bar, 72-stopper, 73-pushing block, 74-arc plate, 75-outer frame, 76-connecting column, 77-lens, 78-pushing rod, 79-connecting block, 710-syringe, 711-guide block, 8-expanding component, 81-bonding block, 82-84-limiting block, 83-sliding bar, 86-contactor, 85-second guide bar, and 88-connecting bar.

Detailed Description

The invention is described in detail below with reference to the drawings and the specific embodiments.

Example 1

The utility model provides an ophthalmic surgery clinical operation table, as shown in fig. 1, fig. 2, fig. 3 and fig. 4, including support frame 1, accept frame 2, supporting mechanism 3 and placement mechanism 4, support frame 1 upper portion is equipped with accepts frame 2, accepts the outside of frame 2 and is equipped with supporting mechanism 3, accepts frame 2 upper portion and is equipped with placement mechanism 4.

The supporting mechanism 3 comprises a placing plate 31, a C-shaped plate 32, first springs 33, a first rotating shaft 34, connecting plates 35, a receiving plate 36 and a first rotating seat 37, the placing plate 31 is arranged on the receiving frame 2, the C-shaped plate 32 is symmetrically arranged on the upper portion of the placing plate 31 in a sliding mode, the first springs 33 are respectively arranged between the C-shaped plate 32 and the placing plate 31, the first springs 33 are respectively sleeved on the C-shaped plate 32, the first rotating seat 37 is symmetrically arranged on the lower portion of the left side of the receiving frame 2, the first rotating shaft 34 is rotatably arranged between the first rotating seats 37, the connecting plates 35 are respectively arranged on the outer side of the first rotating shaft 34, and the receiving plates 36 are arranged between the connecting plates 35.

The placement mechanism 4 comprises a first guide rod 41, a pillow 42, a second spring 43, a placement frame 44, clamping blocks 45 and a third spring 46, wherein two first guide rods 41 are symmetrically arranged on the receiving plate 36 in a sliding mode front and back, the pillow 42 is arranged between the first guide rods 41, the second springs 43 are respectively sleeved on the first guide rods 41 between the pillow 42 and the receiving plate 36, the placement frame 44 is slidably arranged on the left side of the receiving plate 36, two clamping blocks 45 are symmetrically arranged on the inner side of the left side of the receiving plate 36 in a sliding mode front and back, the clamping blocks 45 are matched with the placement frame 44, and the third springs 46 are respectively arranged between the clamping blocks 45 and the receiving plate 36.

When people need to do clinical ophthalmic surgery, the operating table can be used, firstly, medical staff manually rotates the carrying plate 36 to be level with the carrying frame 2, the carrying plate 36 drives the pillow 42, the connecting plate 35 and the first rotating shaft 34 to rotate, then a patient lies on the carrying frame 2, the head is rested on the pillow 42, the second spring 43 is compressed due to the gravity of the head, the arm can be placed on the C-shaped plate 32, the first spring 33 is compressed due to the gravity, after all matters are ready, the operation can be started by using the instrument, the medical staff manually pulls out the carrying frame 44 for placing an operation tool to the left side, the carrying frame 44 drives the clamping block 45 to move outwards, the third spring 46 is compressed, after the operation is finished, the carrying frame 44 is pushed to the right, the clamping block 45 is driven to reset under the reset action of the third spring 46, the clamping block 45 clamps the carrying frame 44, the patient is prevented from sliding outwards, when the head of the patient is no longer rested on the pillow 42, the second spring 43 is driven under the reset action of the second spring 43 to reset, when the patient completely lifts the clamping block, the first spring 33 is driven by the reset plate 36 to reset the first rotating plate 36, and finally the first rotating shaft 35 drives the carrying plate 36 to reset the pillow to move outwards.

Example 2

On the basis of embodiment 1, as shown in fig. 6, 7, 8, 9, 10 and 11, the lifting device further comprises a lifting device 5, the lifting device 5 comprises a second rotating seat 51, a second rotating shaft 52, an air cylinder 53, a limiting ring 54, a third rotating shaft 55 and a groove rod 56, the second rotating seat 51 is symmetrically arranged on the left side of the supporting frame 1, the second rotating shaft 52 is rotatably arranged between the second rotating seats 51, the air cylinder 53 is arranged on the second rotating shaft 52, the limiting ring 54 is arranged on the upper portion of a piston rod of the air cylinder 53, the groove rod 56 is symmetrically arranged on the lower portion of the bearing plate 36, the third rotating shaft 55 is slidably arranged between the groove rods 56, and the third rotating shaft 55 is rotatably connected with the limiting ring 54.

The clamping assembly 6 comprises a shell 61, a third swivel mount 62, a second guide rod 63, a special-shaped rod 64, a foam-rubber cushion 65 and a fourth spring 66, wherein the shell 61 is arranged on the upper portion of the receiving plate 36 in a front-back symmetrical mode, the third swivel mount 62 is located inside the shell 61, the two second guide rods 63 are symmetrically arranged on the upper portion of the receiving plate 36 in a front-back symmetrical mode, the special-shaped rods 64 are slidably arranged between the left side and the right side of the second guide rod 63, the special-shaped rods 64 are matched with the pillow 42, the foam-rubber cushion 65 is slidably arranged on the inner side of the third swivel mount 62, the foam-rubber cushion 65 is matched with the special-shaped rods 64, the fourth spring 66 is arranged between the foam-rubber cushion 65 and the third swivel mount 62, and the fourth spring 66 is sleeved on the foam-rubber cushion 65.

When the bearing plate 36 and the bearing frame 2 need to be held at ordinary times, the air cylinder 53 can be started, the piston rod of the air cylinder 53 drives the limiting ring 54 and the third rotating shaft 55 to move leftwards, when the third rotating shaft 55 moves to the leftmost side of the groove rod 56, the piston rod of the air cylinder 53 continues to move upwards to drive the bearing plate 36 to rotate upwards, the bearing plate 36 drives the air cylinder 53 and the second rotating shaft 52 to rotate when rotating upwards, so that the bearing plate 36 is leveled with the bearing frame 2, when a patient's head is rested on the pillow 42, the pillow 42 drives the special-shaped rod 64 to move downwards, so that the special-shaped rod 64 drives the foam-rubber cushion 65 to move inwards, the foam-rubber cushion 65 contacts with the patient's head, the foam-rubber cushion 65 limits the patient's head, the fourth spring 66 is stretched to prevent the patient from moving in the operation process, after the operation, the patient's head is no longer contacted with the foam-rubber cushion 65, the reset function of the fourth spring 66 drives the foam-rubber cushion 65 to reset the special-shaped rod 64, at this moment, the piston cylinder 53 drives the limiting ring 54, the third spring 55 and the bearing plate 36 to rotate downwards, when the patient's head is rested on the rotating shaft 36, the third rotating shaft 55 moves downwards, the bearing plate 53 is not leveled, and the bearing the rotating shaft is turned off, and the air cylinder 53 is closed, and the rotating correctly, and the rotating shaft 53 is closed.

The automatic syringe comprises a syringe body and is characterized by further comprising an operation assembly 7, wherein the operation assembly 7 comprises a supporting rod 71, a stop block 72, a push block 73, an arc plate 74, an outer frame 75, a connecting column 76, a lens 77, a push rod 78, a connecting block 79, a syringe 710 and a guide block 711, wherein two supporting rods 71 are symmetrically arranged front and back on the outer side of the receiving plate 36, the push block 73 is arranged on the left side of the front special-shaped rod 64, the arc plate 74 is rotatably arranged between the supporting rods 71 on the front side, the stop blocks 72 are respectively arranged on the left side and the right side of the arc plate 74, the stop block 72 on the left side is matched with the push block 73, the outer frame 75 is arranged on the left side of the arc plate 74, the guide block 711 is arranged on the inner side of the outer frame 75, the connecting column 76 is arranged on the left side of the guide block 711, the lens 77 is respectively arranged on the left side of the connecting column 76, the push rod 78 is symmetrically arranged on the right side of the guide block 711, the connecting block 79 is arranged between the lower parts of the connecting column 76, and the syringe 710 is respectively arranged on the lower part of the guide block 78.

The automatic opening device is characterized by further comprising an opening assembly 8, wherein the opening assembly 8 comprises an adhesive block 81, a limiting block 82, a sliding rod 83, an eyelid opener 84, a special-shaped block 85, an adapter rod 86, a fifth spring 87 and a sixth spring 88, the adhesive block 81 is symmetrically arranged at the lower part of the arc plate 74, the limiting block 82 is symmetrically and slidably arranged at the lower part of the adhesive block 81, the sixth spring 88 is respectively sleeved on the limiting block 82, the sliding rod 83 is respectively connected between the limiting blocks 82 through threads, the eyelid opener 84 is matched with the needle cylinder 710, the adapter rod 86 is slidably arranged at the upper part of the outer frame 75, the adapter rod 86 is connected with the arc plate 74, the special-shaped block 85 is slidably arranged at the lower part of the sliding rod 83, the special-shaped block 85 is connected with the adapter rod 86, the fifth spring 87 is arranged between the special-shaped block 85 and the arc plate 74, and the fifth spring 87 is respectively sleeved on the adapter rod 86.

The arc 74 is manually rotated anticlockwise, the arc 74 drives the stop block 72 to rotate, the stop block 72 drives the push block 73 and the special-shaped rod 64 to move downwards, the foam pad 65 is enabled to fix the head of a patient, then the connecting rod 86 is pushed downwards, the connecting rod 86 drives the slide rod 83, the eyelid opener 84 and the special-shaped rod 85 to move downwards, the slide rod 83 moves downwards to drive the limiting block 82 to move outwards to compress the sixth spring 88, when the eyelid opener 84 contacts with eyes, the fifth spring 87 is stretched, then the connecting rod 86 is loosened, the connecting rod 86 is driven to reset with the special-shaped rod 85 under the reset action of the fifth spring 87, the special-shaped rod 85 does not clamp the eyelid opener 84 any more, the eyes are opened by the eyelid opener 84, at this moment, the eyes can be observed through the lens 77, then the guide block 711 is manually moved rightwards, after the position is determined, the push rod 78 is manually pressed downwards, the anesthetic in the push rod is extruded, the anesthetic in the eye opener can be dropped into the eyes of the patient, the eye opener 84 is reset, the needle slider is reset 84 is reset, the needle slider 82 is reset, and finally the needle slider is reset, the needle slider 84 is reset, and the needle guide block 82 is manually moved upwards, and the anesthetic in the eye is reset, and the eye is moved.

While the present disclosure has been shown and described with reference to certain exemplary embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present disclosure as defined by the appended claims and their equivalents. The scope of the disclosure should, therefore, not be limited to the above-described embodiments, but should be determined not only by the following claims, but also by the equivalents of the following claims.

Claims

1. An ophthalmic surgery clinical operating table, which is characterized by comprising:

the support frame (1) and the bearing frame (2), the bearing frame (2) is arranged at the upper part of the support frame (1);

the supporting mechanism (3) is arranged at the outer side of the bearing frame (2);

a placing mechanism (4), wherein the placing mechanism (4) is arranged at the upper part of the bearing frame (2);

the supporting mechanism (3) comprises:

a placing plate (31), the bearing frame (2) is provided with the placing plate (31);

the upper part of the placing plate (31) is symmetrically and slidably provided with the C-shaped plate (32);

the first springs (33) are arranged between the C-shaped plates (32) and the placing plates (31), and the first springs (33) are respectively sleeved on the C-shaped plates (32);

the first rotating seat (37) is symmetrically arranged at the lower part of one side of the bearing frame (2);

the first rotating shafts (34) are rotatably arranged between the first rotating bases (37);

the connecting plates (35) are arranged on the outer sides of the first rotating shafts (34);

a bearing plate (36), wherein the bearing plate (36) is arranged between the connecting plates (35);

the placement mechanism (4) comprises:

the first guide rods (41) are symmetrically and slidably arranged on the bearing plate (36), and two first guide rods (41) are symmetrically and slidably arranged on the bearing plate;

a pillow (42) is arranged between the first guide rods (41);

the second springs (43), are arranged between the pillow (42) and the bearing plate (36), and the second springs (43) are respectively sleeved on the first guide rods (41);

a placement frame (44), wherein the placement frame (44) is slidably arranged on one side of the receiving plate (36);

the clamping blocks (45) are symmetrically and slidably arranged in one side of the bearing plate (36), and the clamping blocks (45) are matched with the placing frame (44);

a third spring (46), wherein the third spring (46) is arranged between the clamping block (45) and the bearing plate (36);

the lifting device further comprises a lifting assembly (5), and the lifting assembly (5) comprises:

the second rotary seat (51) is symmetrically arranged on one side of the support frame (1);

the second rotating shafts (52) are rotatably arranged between the second rotating bases (51), and the second rotating shafts (52) are rotatably arranged between the second rotating bases (51);

the cylinder (53) is arranged on the second rotating shaft (52);

a limiting ring (54), wherein the upper part of a piston rod of the air cylinder (53) is provided with the limiting ring (54);

the groove rods (56) are symmetrically arranged at the lower part of the bearing plate (36);

the third rotating shaft (55) is arranged between the groove rods (56) in a sliding mode, and the third rotating shaft (55) is rotationally connected with the limiting ring (54);

still including chucking subassembly (6), chucking subassembly (6) are including:

a housing (61), wherein the housing (61) is symmetrically arranged at the upper part of the bearing plate (36);

the third rotary seat (62) is symmetrically arranged on the upper part of the bearing plate (36), and the third rotary seat (62) is positioned in the shell (61);

the second guide rods (63) are symmetrically arranged at the upper part of the bearing plate (36), and two second guide rods (63) are symmetrically arranged at the upper part of the bearing plate;

the special-shaped rods (64) are arranged between the second guide rods (63) in a sliding mode, and the special-shaped rods (64) are matched with the pillow (42);

the inner sides of the third rotary seat (62) are respectively provided with a foam cushion (65) in a sliding manner, and the foam cushion (65) is matched with the special-shaped rod (64);

a fourth spring (66), wherein the fourth spring (66) is arranged between the foam-rubber cushion (65) and the third rotary seat (62), and the fourth spring (66) is sleeved on the foam-rubber cushion (65);

the device also comprises an operation assembly (7), wherein the operation assembly (7) comprises:

the support rods (71) are symmetrically arranged on the outer side of the bearing plate (36);

a pushing block (73), wherein the pushing block (73) is arranged on one side of the special-shaped rod (64) on one side;

an arc-shaped plate (74) is rotatably arranged between the support rods (71) on one side;

the stop blocks (72) are arranged on two sides of the arc-shaped plate (74), and the stop blocks (72) on the left side are matched with the pushing blocks (73);

an outer frame (75), wherein one side of the arc-shaped plate (74) is provided with the outer frame (75);

a guide block (711), a guide block (711) is slidably arranged on one side of the arc-shaped plate (74), and the guide block (711) is positioned on the inner side of the outer frame (75)

A connecting column (76), wherein one side of the guide block (711) is provided with the connecting column (76);

a lens (77), wherein one side of the connecting column (76) is provided with the lens (77);

the push rod (78), one side of the guide block (711) is symmetrically and slidably provided with the push rod (78);

a connecting block (79), wherein the connecting block (79) is arranged between the lower parts of the connecting columns (76);

the needle cylinder (710) and the lower part of the push rod (78) are respectively provided with the needle cylinder (710).

2. An ophthalmic surgical clinical operating table according to claim 1, characterized in that it further comprises a spreader assembly (8), the spreader assembly (8) being provided on the upper part of the operating assembly (7).

3. An ophthalmic surgical clinical operating table according to claim 2, characterized in that the spreader assembly (8) comprises:

the lower part of the arc-shaped plate (74) is symmetrically provided with the bonding blocks (81);

the limiting blocks (82) are symmetrically and slidably arranged at the lower parts of the bonding blocks (81);

a sixth spring (88), wherein the sixth spring (88) is arranged between the limiting block (82) and the bonding block (81), and the sixth springs (88) are respectively sleeved on the limiting block (82);

the sliding rods (83) are connected between the limiting blocks (82) through threads;

the eyelid retractor (84), the lower part of the slide bar (83) is provided with the eyelid retractor (84), and the eyelid retractor (84) is matched with the needle cylinder (710);

a connecting rod (86), wherein the upper part of the outer frame (75) is provided with the connecting rod (86) in a sliding manner, and the connecting rod (86) is connected with the arc-shaped plate (74);

the special-shaped blocks (85) are arranged at the lower parts of the sliding rods (83) in a sliding mode, and the special-shaped blocks (85) are connected with the connecting rods (86);

and a fifth spring (87), wherein the fifth spring (87) is arranged between the special-shaped block (85) and the arc-shaped plate (74), and the fifth springs (87) are respectively sleeved on the connecting rods (86).